this post was submitted on 27 Mar 2025
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Academia Gone Wild
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It's incredibly rare but here's the gist: simulating the rectum can cause autonomic vagal stimulation. The vagus nerve is also related to the cardiac system. It can cause a loss in vascular tone and a drop in blood pressure. This can result in unconsciousness(which we call vasovagal syncope) and arrhythmias. If you have other underlying problems and are fragile this can result in death very rarely. Most people will only feel lightheaded or faint. Some people have felt sudden dizziness when bearing down on the toilet: that's a vasovagal reflex. The vagus, along with the phrenic nerve, also is what is involved in the diaphragm and causes hiccups. This treatment is essentially trying to stimulate the vagus. We have a similar treatment for atrial fibrilation where we tell people to hold their breath and bear down like they're trying to poop. Its designed to reset the heart and stop the AFib. That's called the Valsalva maneuver. Also used to treat hiccups.
Thanks. That makes sense now. The only thing I struggled with was vascular tone, which I now understand to mean the blood vessels can have excessive vasodilation causing the drop in BP.
Interestingly I’ve had a poor or two like this where I thought I was about to pass out. Is this something explicitly brought on by the action of popping? As both times it happened to me I was normal and then all of a sudden I started to sweat profusely and the urge to empty my bowels came on in mere seconds.
Never thought I’d be discussing bowel movements online.
It's actually very common to experience that a few times. And it's related to what's physically happening to the nerves. It's just very rare for people to die from it. It's considered to be generally safe. The whole point of the treatment in the paper is to cause that exact feeling.
But yeah, look up the symptoms of vasovagal reflex and you'll find they match up to that to a T.
Thank you. This was an interesting chat and it makes understanding the original post a little easier for me.
Have a nice day!
So then if this was going to happen, it could happen by someone pooping?
Yes, it's a big part of stories of people dying on the toilet while constipated. Vasovagal syncope without any real danger is very common on the toilet. You really have no need to see a doctor if you experience it. It's only if you have serious underlying conditions that make it dangerous.